If you think it's hot now, just wait. Heat waves are becoming more frequent globally. But how do we measure heat waves? We explain.
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A brutal midsummer heat wave has spread across the eastern two-thirds of the nation, bringing sweltering temperatures to some 195 million Americans from New Mexico to Maine.
Temperatures around 100 degrees are possible in Washington, D.C, Baltimore, Philadelphia, New York City, Boston, Chicago, and St. Louis, AccuWeather said. For a while on Saturday, it will feel about as hot in Washington, D.C., as it is in Death Valley, California, according to AccuWeather.
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